body {
    display: flex;
    flex-direction: column;

    // 主体
    .main {
        height: 100px;
        flex-grow: 1;
        overflow-y: auto;
    }

    // 底部导航
    .tabbar {
        height: 60px;
        background: #fff;
        box-shadow: 0px -3px 5px 0px #ddd;
        display: flex;
        justify-content: space-around;
        align-items: center;

        i {
            display: block;
            text-align: center;
            font-size: 30px;
        }

        a {
            color: #777;

            &.active {
                color: #4294ff;
            }
        }
    }
}